1. Sediment Settling Lab

2. Step 1: Copy over your Hypothesis onto your lab handout and then hand the hypothesis in.

3. Detritus Type (check your notes) Tracing of Sediment/Bead Size Procedure 1. Separate the sediments in your jar into piles depending on the size. 2. Decide which size will have what classification of detritus size. 3. Trace the size of the bead that will have each classification so you have a record of how large each bead was.

4. 4. Securely stopper the bottom end of your tube. 5. Fill your tube with water leaving about 5 inches empty at the top. 6. Measure and record the height of the water in the tube. 7. Have the timer prepare to time. 8. Drop the sediment size for the trial in. Distance FallenTime to FallSpeed of the falling Bead/Sediment 9. The timer starts timing as soon as the bead/beads hit the water and stops when they reach the bottom. (record the time in the data table)

5. 10. Calculate the speed the bead traveled. Speed = Distance/Time Speed of the falling Bead/Sediment

6. 10. Place a large bucket under the tube and carefully remove the stopper. 11. Catch all the water and beads in the bucket. 12. Pour the water and beads through a strainer allowing the water to go down the drain but catching all of the beads, (please do not let the smallest beads go down the drain).

7. 13. Repeat the process with the change that this time the timer records the time for a different size of bead.

8. 14. Mix all the beads together in a flask. 15. Using an index card as a lid place the flask upside down on the top of the tube. Be sure you have already filled the tube with water. 16. Pull the index card smoothly out from under the flask and allow all of the beads to fall into the tube at the same time. 17. Observe how the beads fall and record your observations and the final result in the second data table. 18. Empty the tube into the bucket and pour the water and beads through a strainer to catch all of the beads.

9. Create a single line graph of distance verses time that includes the data for each sediment size. The best thing to do is to make a key and graph each beads distance verses time data in its own color on the same graph.

10. Conclusion: Using the data you collected answer the following questions that were posed at the beginning of the lab. Paragraph 1: How will the different sizes of sediment fall through the water compared to each other. For example which size do you think will be the fastest and why. 1 st Sentence: Answer the Question definitively based on the data. Remainder of Paragraph: Use the data you collected as evidence to support your conclusion. Was your hypothesis correct for this question? Paragraph 2: What will all the different sizes of sediment look like when they reach the bottom. I realize the beads themselves will be unchanged. But how will they be arranged. 1 st Sentence: Answer the Question definitively based on the data: Remainder of paragraph. Use the data you collected as evidence. Was your hypothesis correct for this question? Paragraph 3: Apply the conclusions you reached in this lab to the sediment you will find at the mouth of the Columbia River. (the mouth of the Columbia is the place where the river empties into the Ocean at Astoria). If you were diving along the bottom from the mouth on out what type of sediment would you see as you traveled outward?